BEST Win10 Chinese IME: PIME

Download link: https://github.com/osfans/PRIME/releases

LOL IME NOT displayed solution:

Add the following lines to ..\GameData\Apps\LoLTW\Game\DATA\Menu\IMEConfig.xml in ChineseSimplified section:

Auto close progress batch on windows

1.1800 means 30min(60 second * 30)
2.5996 can be replaced by the target pid.